...1th; McCausland moving on the Georgetown pike, while the infantry, preceded by Imboden's cavalry under Colonel Smith, turned to the left at Rockville, so as to reach the 7th Street pike which runs by Silver Spring into Washington.
Jackson's cavalry moved on the left flank.
The previous day had been very warm, and the roads were exceedingly dusty, as there had been no rain for several weeks.
The heat duri...